Contractors please help me:
I have a roofing report from KRL Inc. They taut their reports as up to 96% accurate. What is your experience with KRL or other companies such as these offering such reports?
Do squares of asphalt shingles need to be added to the report area squares for ridge caps?
If so, the report gives lengths for ridges allowing calculation. How is the calculation done? (I an cutting 3-tab shingles for ridge cap covering.)
Is material quantity for covering a ridge vent the same as a ridge cap?
How would starter row material be calculated? (I assume using eve and rake lengths and ??)
Do you have a rule of thumb for calculating nail usage per square of area for attaching under-layment felt and shingles? For attaching drip edge? Etc.?
Is 5% waste a reasonable number for asphalt shingles?
Thank you for your help.